WTB: Tunze Osmolator

[ponokareefer]

First off, I did see one of these models on J&L's website and with the price, you could get free shipping. I'm assuming you are looking for cheaper though.
I had a question about this model if anyone knows. Where do you mount them usually? I'd assume it's to your sump, but that's a lot of room under your tank to be taking up.